If you could bring back one great artist that has

Yep, bringing back Bach would seem to open up the most interesting avenues of anyone mentioned. Duke Ellington in his prime would still be right up there as well in terms of modern day versatility. Beethoven I can see possibilities for him as well. :^}

Mahler would be another possibility if we can just bring out his less serious side a bit on occasion. Hell, bring back Stravinsky as well while we're at it and team him up with Kanye West!

Satan would be pleased as hell to see one of his greatest foes come back as a rocker EEEEEEEEEEEEEEEEEEEEKKKKKKK .

Schubert, if he did, I'd be willing to bet he would be one of the good guys doing it. Might even be able to have a positive influence on some in need the most.

Not sure I could see him working with Kanye West, Rolling Stones, or many others. I could see it working out with Metallica maybe. That would be interesting! Can't speak for Satan though. maybe it would worry him perhaps just a tiny bit? :^}

After all if TOny Bennet can work with Lady Gaga, who knows what other odd couple pairings might work? As long as they have something in common.